There is no email validation in the page /comment-subscriptions/?srp=POST-ID&srk=NUMBER&sra=s "You can follow the discussion on ... without having to leave a comment... Just enter your email address".
If I press the Send button without entering a mail it continues as normal and shows "Thank you for using our subscription service...". The mail "email" is added as a subscription for the post.
Also, if I send an invalid mail like "aaa" is also saved.
There is no email validation in the page /comment-subscriptions/?srp=POST-ID&srk=NUMBER&sra=s "You can follow the discussion on ... without having to leave a comment... Just enter your email address".
If I press the Send button without entering a mail it continues as normal and shows "Thank you for using our subscription service...". The mail "email" is added as a subscription for the post.
Also, if I send an invalid mail like "aaa" is also saved.